Appliances with PCB trace integrity sensing
a technology of trace integrity and sensing device, which is applied in the field of automatic sensing can solve the problems of pcb trace integrity breakdown, damage to attached loads, and breakdown form, and achieve the effect of preventing the breakdown of trace integrity
Active Publication Date: 2020-10-13
HAIER US APPLIANCE SOLUTIONS INC
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This solution effectively prevents trace breakdown and arc-tracking, reducing the risk of appliance failure and enabling timely replacement of PCBs, thus minimizing costly repairs.
Problems solved by technology
Depending upon frequency of use and other scenarios, traces in the PCB may begin to breakdown.
This form of breakdown, also termed arc-tracking, can be detrimental to the attached loads.
For example, some arc-tracking events may provide for catastrophic failure of one or more loads or components of an appliance.
Method used
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[0015]Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
[0016]As used herein, the term “or” is generally intended to be inclusive (i.e., “A or B” is intended to mean “A or B or both”). Furthermore, as used herein, terms of approximation, such as “approximately” or “substantially,” refer to being within a ten per...
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An appliance with automatic sensing of printed circuit board (PCB) trace integrity and associated methods of sensing are provided. The appliance may include a controller operative to control operation of the appliance, a load in operative communication with the controller, and a PCB. The PCB may include a first trace supplying AC power to the load, a second trace supplying a return path for the AC power, a third trace supplying an alternate return path for the AC power, and current sensing circuitry. The current sensing circuitry may be configured to sense leakage current between the first trace and the third trace, with the leakage current being indicative of declining trace integrity of the PCB.
Description
FIELD OF THE INVENTION[0001]The present subject matter relates generally to appliances, and more particularly to appliances with automatic sensing of PCB trace integrity.BACKGROUND OF THE INVENTION[0002]In existing appliances, one or more printed circuit boards (PCB) may be used to provide AC power and control signals to different loads of the appliance. For example, in a dishwashing appliance, PCBs may be used to supply AC power to a wash tub, heater, pumps, and other loads. Depending upon frequency of use and other scenarios, traces in the PCB may begin to breakdown. This form of breakdown, also termed arc-tracking, can be detrimental to the attached loads. For example, some arc-tracking events may provide for catastrophic failure of one or more loads or components of an appliance.[0003]As a result, further improvements in preventing arc-tracking in appliances may be desirable. In particular, it would be advantageous to provide a PCB with automatic sensing of trace integrity to av...
Claims
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IPC IPC(8): H05K1/03G01R31/28H05K1/02H01H47/00
CPCG01R31/2853H01H47/002H05K1/0268A47L15/46A47L2401/30G01R31/2815G01R31/2818G01R31/52H01H83/144H02H3/33H02H5/10H05K2201/09872
Inventor FARRIS, BRETT ALANHERVOL, ERIC THEODORE
Owner HAIER US APPLIANCE SOLUTIONS INC